Originally Posted by CanuckRAV4
Let me guess, you stowed your TPMS wheels in the garage, and parked your vehicle in the same space?
The self-check each time you started up in the vicinity of the TPMS wheels clears the warning light as you're leaving. The next check on the road catches the phantom 'low tire pressure' condition and sets off the warning light.
If this is true, the self-check must not be running frequent enough to catch a catastrophic pressure leak . . . .
YES! That's what's going on!
Interesting. OK, I guess I'll just pile all of my other tires into the back and I'll be all set.
It's amazing nobody has designed and sold a "TPMS-Checker" black box that grabs the frequency of the old set of sensors and generates the signal. Just read off the old frequencies, flip the switch to "broadcast" and chuck it in the glovebox for the winter.